diff --git a/browser/components/preferences/dialogs/colors.xhtml b/browser/components/preferences/dialogs/colors.xhtml
index 1720cf349847..3181dd5c6d4a 100644
--- a/browser/components/preferences/dialogs/colors.xhtml
+++ b/browser/components/preferences/dialogs/colors.xhtml
@@ -41,7 +41,11 @@
 
     <hbox>
       <groupbox flex="1">
-        <label><html:h2 data-l10n-id="colors-text-and-background" /></label>
+        <label
+          ><html:h2
+            class="heading-medium"
+            data-l10n-id="colors-text-and-background"
+        /></label>
         <hbox align="center">
           <label
             data-l10n-id="colors-text-header"
@@ -74,7 +78,9 @@
       </groupbox>
 
       <groupbox flex="1">
-        <label><html:h2 data-l10n-id="colors-links-header" /></label>
+        <label
+          ><html:h2 class="heading-medium" data-l10n-id="colors-links-header"
+        /></label>
         <hbox align="center">
           <label
             data-l10n-id="colors-unvisited-links"
diff --git a/browser/components/preferences/dialogs/connection.xhtml b/browser/components/preferences/dialogs/connection.xhtml
index 2a1a3c011511..604711a9311c 100644
--- a/browser/components/preferences/dialogs/connection.xhtml
+++ b/browser/components/preferences/dialogs/connection.xhtml
@@ -63,7 +63,11 @@
     </hbox>
 
     <groupbox>
-      <label><html:h2 data-l10n-id="connection-proxy-configure" /></label>
+      <label
+        ><html:h2
+          class="heading-medium"
+          data-l10n-id="connection-proxy-configure"
+      /></label>
 
       <radiogroup id="networkProxyType" preference="network.proxy.type">
         <radio value="0" data-l10n-id="connection-proxy-option-no" />
diff --git a/browser/components/preferences/dialogs/fonts.xhtml b/browser/components/preferences/dialogs/fonts.xhtml
index 44dc473ccbd7..cd3537132486 100644
--- a/browser/components/preferences/dialogs/fonts.xhtml
+++ b/browser/components/preferences/dialogs/fonts.xhtml
@@ -43,7 +43,9 @@
     <groupbox>
       <hbox align="center">
         <label control="selectLangs"
-          ><html:h2 data-l10n-id="fonts-langgroup-header"
+          ><html:h2
+            class="heading-medium"
+            data-l10n-id="fonts-langgroup-header"
         /></label>
       </hbox>
       <menulist id="selectLangs" preference="font.language.group">
diff --git a/toolkit/themes/shared/in-content/common-shared.css b/toolkit/themes/shared/in-content/common-shared.css
index d123d3c3b01a..aa2faa9a1706 100644
--- a/toolkit/themes/shared/in-content/common-shared.css
+++ b/toolkit/themes/shared/in-content/common-shared.css
@@ -620,6 +620,10 @@ html|textarea {
   min-height: var(--input-text-min-height);
 }
 
+html|textarea {
+  min-height: auto
+}
+
 html|input:where([type="email"], [type="tel"], [type="text"], [type="password"], [type="url"], [type="number"]):focus,
 html|textarea:focus,
 xul|search-textbox[focused],